dlls/msvcrt/thread.c

   1 /*
   2  * msvcrt.dll thread functions
   3  *
   4  * Copyright 2000 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include "msvcrt.h"
  21
  22 #include "msvcrt/malloc.h"
  23 #include "msvcrt/process.h"
  24
  25 #include "wine/debug.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  28
  29 /********************************************************************/
  30
  31 typedef struct {
  32   _beginthread_start_routine_t start_address;
  33   void *arglist;
  34 } _beginthread_trampoline_t;
  35
  36 /*********************************************************************
  37  *              msvcrt_get_thread_data
  38  *
  39  * Return the thread local storage structure.
  40  */
  41 MSVCRT_thread_data *msvcrt_get_thread_data(void)
  42 {
  43     MSVCRT_thread_data *ptr;
  44     DWORD err = GetLastError();  /* need to preserve last error */
  45
  46     if (!(ptr = TlsGetValue( MSVCRT_tls_index )))
  47     {
  48         if (!(ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ptr) )))
  49             MSVCRT__amsg_exit( _RT_THREAD );
  50         if (!TlsSetValue( MSVCRT_tls_index, ptr )) MSVCRT__amsg_exit( _RT_THREAD );
  51     }
  52     SetLastError( err );
  53     return ptr;
  54 }
  55
  56
  57 /*********************************************************************
  58  *              _beginthread_trampoline
  59  */
  60 static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
  61 {
  62     _beginthread_trampoline_t local_trampoline;
  63
  64     /* Maybe it's just being paranoid, but freeing arg right
  65      * away seems safer.
  66      */
  67     memcpy(&local_trampoline,arg,sizeof(local_trampoline));
  68     MSVCRT_free(arg);
  69
  70     local_trampoline.start_address(local_trampoline.arglist);
  71     return 0;
  72 }
  73
  74 /*********************************************************************
  75  *              _beginthread (MSVCRT.@)
  76  */
  77 unsigned long _beginthread(
  78   _beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
  79   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
  80   void *arglist)           /* [in] Argument list to be passed to new thread or NULL */
  81 {
  82   _beginthread_trampoline_t* trampoline;
  83
  84   TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
  85
  86   /* Allocate the trampoline here so that it is still valid when the thread
  87    * starts... typically after this function has returned.
  88    * _beginthread_trampoline is responsible for freeing the trampoline
  89    */
  90   trampoline=MSVCRT_malloc(sizeof(*trampoline));
  91   trampoline->start_address = start_address;
  92   trampoline->arglist = arglist;
  93
  94   /* FIXME */
  95   return (unsigned long)CreateThread(NULL, stack_size, _beginthread_trampoline,
  96                                      trampoline, 0, NULL);
  97 }
  98
  99 /*********************************************************************
 100  *              _beginthreadex (MSVCRT.@)
 101  */
 102 unsigned long _beginthreadex(
 103   void *security,          /* [in] Security descriptor for new thread; must be NULL for Windows 9x applications */
 104   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 105   _beginthreadex_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 106   void *arglist,           /* [in] Argument list to be passed to new thread or NULL */
 107   unsigned int initflag,   /* [in] Initial state of new thread (0 for running or CREATE_SUSPEND for suspended) */
 108   unsigned int *thrdaddr)  /* [out] Points to a 32-bit variable that receives the thread identifier */
 109 {
 110   TRACE("(%p, %d, %p, %p, %d, %p)\n", security, stack_size, start_address, arglist, initflag, thrdaddr);
 111
 112   /* FIXME */
 113   return (unsigned long)CreateThread(security, stack_size,
 114                                      (LPTHREAD_START_ROUTINE) start_address,
 115                                      arglist, initflag, (LPDWORD) thrdaddr);
 116 }
 117
 118 /*********************************************************************
 119  *              _endthread (MSVCRT.@)
 120  */
 121 void _endthread(void)
 122 {
 123   TRACE("(void)\n");
 124
 125   /* FIXME */
 126   ExitThread(0);
 127 }
 128
 129 /*********************************************************************
 130  *              _endthreadex (MSVCRT.@)
 131  */
 132 void _endthreadex(
 133   unsigned int retval) /* [in] Thread exit code */
 134 {
 135   TRACE("(%d)\n", retval);
 136
 137   /* FIXME */
 138   ExitThread(retval);
 139 }